The mass shooter’s grandmother, 81-year-old Marie Fitzgerald said from her home in New South Wales that the family is at a loss.

“We’re all gobsmacked,” she said. “It’s just so much for everything to take in that somebody in our family would do anything like this.”

She said her 28-year-old grandson spent a lot of his youth playing computer games and browsing the Internet and that she didn’t think “girlfriends were on the agenda.” His father died from cancer in 2010 she said.

“It’s only since he traveled overseas [to Europe] that the boy has changed completely,” she said.

The last time she saw him was two weeks ago in the Australian city of Grafton for his sister’s birthday.